27-Apr-06 JAWS Deployment-Support Network Principle – Status – Current Work Jan Beutel Computer Engineering and Networks Lab, ETH Zurich

2 Virtualization and Emulation  EmStar [Ganesan2004]  BEE [Chang2003,Kuusilinna2003] Today's WSN Design and Development Scale Reality Figure abridged from D. Estrin/J. Elson Simulation  TOSSIM [Levis2003]  PowerTOSSIM [Shnayder2004]  Avrora [Titzer2005] Test Grids  moteLab [Werner-Allen2005]  Emstar arrays [Cerpa03/04]  Kansei [Dutta2005] Closing in on the “real” experience Specialized simulation tools for WSN applications Fast-prototyping in a controlled environment

3 ? Virtualization and Emulation  EmStar [Ganesan2004]  BEE [Chang2003,Kuusilinna2003] Today's WSN Design and Development Scale Reality Figure abridged from D. Estrin/J. Elson Simulation  TOSSIM [Levis2003]  PowerTOSSIM [Shnayder2004]  Avrora [Titzer2005] Test Grids  moteLab [Werner-Allen2005]  Emstar arrays [Cerpa03/04]  Kansei [Dutta2005]

4 From Proof-of-concept to Real-world WSNs Traditional test grid  Wired  Immobile  Not scalable In-network tools  Unreliable Self-organizing backbone network with deployment-support services Deployment-Support Network

5 Target Sensor Network Next-Generation Deployment-Support Developer Workstation Deployment-Support Network  Temporary, minimal invasive  Virtual connections to nodes  Reliable, wireless, scalable

6 WSN Target Application JAWS – Application Partitioning JAWS Application  Topology Control  Connection Management  Data Transport  Caching  Node Management Target Adapter  Target Control  Programming  Logging Monitor  Threads/IRQs  High level context Codesize 100 kB 4 kB 2 kB

7 Target Sensor Network SNMT – Sensor Network Monitoring Toolkit A suite of services based on the JAWS deployment-support network  Remote logging and event detection  BTnut OS tracing facility  Long-term logging and analysis  Remote programming  Generic DSN access  Power and status monitoring  Coordinated fault injection

8 JAWS – Application Example Test Setup: 20+ nodesDistributed Event Tracing  Time-synchronized  Context switches  Interrupts

9 JAWS – Field Experiments Deployment using 70+ nodes on an office floor Largest connected Bluetooth Scatternet

10 Target Sensor Network Deployment-Support – Closing the Loop… Full life-cycle support for Sensor Networks Feedback to concept, design and development under real-life, production conditions

11 JAWS – Operational Prerequisites Network Control Interface  Get events (within a given time interval)  Send immediate single command  Topology request  Status requests  Schedule recursive commands  Schedule commands at DSN node All information is run through a server with an attached database that takes care of fetching data from the DSN.

12 JAWS – Operational Prerequisites cont. Logical Target Interface  Target programming  Power control/monitoring (power on/off, battery status)  Hardware control (toggle pins, similar like led patterns)  ASCII control (send string/command/action over UART)  Target hardware logging  Target ASCII logging Actions are scheduled for execution in a queue at each DSN node. Data is time-stamped and logged locally.

13 JAWS – Application Overview Infra structure Device Under Test

14 JAWS – Target Interface Target Programming Buffered Action Queue  Scalability  Distributed actuation  Flexibility Local Data Logging  Time synchronized  Custom log filters  Retrieval on demand  Notification on demand

15 JAWS – DSN Server Details

16 JAWS – Development Demonstrated Scalability (EWSN 2006)  40+ node demo on three floors  SNMT services operational Major BTnut/JAWS Structural Rollover  Code roll-over working  Two Connection manager variants (tree and XTC mesh)  Testing under way MSP430 Target Adapter  Interface definition  Implementation started

17 JAWS – Current ETHZ DSN – Node  JAWS connection manager  Event detection/logging  Time synchronization  Target adapter  People: KM, MD, JB DSN – Server  Server  Polling engine, Database  Trend/Status monitor  People: JB, MD, TK FSN Prototype  Tmote Sky based  People: AM, RL User Interface  Test Case Generator  Trend Analyzer  People: PO, JB, TK, MD

18 JAWS – Current Status DSN – Node  JAWS connection manager  Event detection/logging  Time synchronization  Target adapter  People: KM, MD, JB DSN – Server  Server  Polling engine, Database  Trend/Status monitor  People: JB, MD, TK FSN Prototype  Tmote Sky based  People: AM, RL User Interface  Test Case Generator  Trend Analyzer  People: PO, JB, TK, MD

19 To probe further…